I love this type of Swap! It's a great way to share your expertise or lack of! lol
My first swap was in 2004 and an entire group swapped "kitty" blocks. You could use any method you liked making all the same size blocks! I learned so much, later in a different swap which I hostessed on Block Central was called "Block Party Surprise"..members signed up and each was assigned a month to choose a block and alternate..had to be a free online pattern everyone could obtain. We had to post a photo of our block or we would be out of the swap! There were blocks that I never would have attempted if not required to continue with the swap.
These swaps really do help everyone to learn new things and get better doing old ones!
Hugs,
CajunBear